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- 'use strict';
-
- var test = require('tape');
-
- var setDunderProto = require('../set');
-
- test('setDunderProto', { skip: !setDunderProto }, function (t) {
- if (!setDunderProto) {
- throw 'should never happen; this is just for type narrowing'; // eslint-disable-line no-throw-literal
- }
-
- // @ts-expect-error
- t['throws'](function () { setDunderProto(); }, TypeError, 'throws if no arguments');
- // @ts-expect-error
- t['throws'](function () { setDunderProto(undefined); }, TypeError, 'throws with undefined and nothing');
- // @ts-expect-error
- t['throws'](function () { setDunderProto(undefined, undefined); }, TypeError, 'throws with undefined and undefined');
- // @ts-expect-error
- t['throws'](function () { setDunderProto(null); }, TypeError, 'throws with null and undefined');
- // @ts-expect-error
- t['throws'](function () { setDunderProto(null, undefined); }, TypeError, 'throws with null and undefined');
-
- /** @type {{ inherited?: boolean }} */
- var obj = {};
- t.ok('toString' in obj, 'object initially has toString');
-
- setDunderProto(obj, null);
- t.notOk('toString' in obj, 'object no longer has toString');
-
- t.notOk('inherited' in obj, 'object lacks inherited property');
- setDunderProto(obj, { inherited: true });
- t.equal(obj.inherited, true, 'object has inherited property');
-
- t.end();
- });
-
- test('no dunder proto', { skip: !!setDunderProto }, function (t) {
- if ('__proto__' in Object.prototype) {
- t['throws'](
- // @ts-expect-error
- function () { ({}).__proto__ = null; }, // eslint-disable-line no-proto
- Error,
- 'throws when setting Object.prototype.__proto__'
- );
- } else {
- t.notOk('__proto__' in Object.prototype, 'no __proto__ in Object.prototype');
- }
-
- t.end();
- });
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